Kemp Technologies, which makes load-balancing appliances, released this week Virtual LoadMaster Exchange for Hyper-V, a load-balancer designed to work exclusively with Exchange 2010 and Microsoft's hypervisor.

Microsoft took the opportunity at Tech-Ed 2011, currently underway in Atlanta, Ga., to announce new improvements to Exchange 2010 that will avoid supported scenarios when running the software in a virtualized environment.

Virtualization has brought the lost art of performance tuning back into the datacenter. Here's how to tune your VMs and hypervisor, and optimize CPU resources and memory to get the most out of your virtual servers.